Which statement describes the structure of an atom? 1. The nucleus contains positively charged electrons
2. The nucleus contains negatively charged electrons
3. The nucleus has a positive charge and is surrounded by negatively charged electrons.
4. The nucleus has a negative charge and is surrounded by positively charged electrons.

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later